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mina [271]
2 years ago
11

What do you use to write on a blackboard? ​

Physics
2 answers:
Archy [21]2 years ago
6 0

Answer:

Chalk

Explanation:

please mark as brainliest

Elina [12.6K]2 years ago
4 0

Answer:

Chalk, expo markers. Why?

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"a musical tone sounded on a piano has a frequency of 261.6 hz and a wavelength of 1.31 m. what is the speed of the sound wave
Andreyy89
To solve this question, we use the wave equation which is:
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If you fall from a building onto a net which extends the time of impact by 10 times, what happens to the force you experience?
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